Renewable Heating
Air Source Heat Pump Installation in Sussex and Surrey
Heating your home shouldn't cost the earth — and with the right system, it won't.
Boilers On-Demand installs air source heat pumps for homeowners across Sussex and Surrey. Lower running costs, reduced carbon emissions, and up to £7,500 in government funding available right now. With 36+ years of experience and 1,000+ installations behind us, we know exactly what works — and we'll make sure it works for you.
Get a Free QuoteMCS Certified Installation
Grant eligible — approved installer
Up to £7,500 government grant
Heat Pump Technology
What Is an Air Source Heat Pump?
Think of it as central heating that runs on fresh air.
An air source heat pump pulls natural heat from the outside air and moves it into your home as heating and hot water. It works in temperatures as low as minus 15 degrees Celsius so Sussex and Surrey winters are no problem.
For every unit of electricity it uses, it produces 3 to 4 units of heat. That efficiency gap is what makes the difference on your bills and on your carbon footprint.
The Process
How Does It Work?
The outdoor unit draws in air and passes it over a coil filled with refrigerant. The refrigerant absorbs the heat, turns to gas, and gets compressed — which raises the temperature further. That heat then moves into your radiators, underfloor heating, or hot water cylinder.
Quietly. Continuously. Around the clock.
It sounds complicated. It really isn't. Our engineers will walk you through the whole thing before, during, and after installation — until you are completely comfortable.
Boiler Upgrade Scheme
Get Up to £7,500 Toward Your Installation
The government wants more homes off gas. To make that easier, they are currently offering eligible homeowners up to £7,500 through the Boiler Upgrade Scheme.
The grant runs until 2028 and is applied directly to your installation cost. You never handle the money. You simply pay less.
As your local MCS-accredited installer, we manage the entire application on your behalf — from checking your eligibility to getting the paperwork filed. You focus on the result. We handle the rest.
Not sure if your property qualifies? Call us on 01903 802395 and we will tell you within minutes.
Installation Cost
What Does Air Source Heat Pump Installation Cost in Sussex and Surrey?
Every property is different, so every quote is tailored. As a guide:
Air-to-Air System
From £2,500
Simpler setup, lower upfront cost, ideal for supplementary heating.
Air-to-Water System
£8,000 – £13,000
Fully installed. The complete solution for heating and hot water throughout your home.
After the £7,500 Boiler Upgrade Scheme grant, the real cost to most eligible homeowners is significantly lower than the headline figure suggests.
No hidden costs. No surprises. We provide a clear, itemised quote before anything begins — and we only proceed when you are ready.
Why Choose Us
Why Sussex and Surrey Homeowners Choose Boilers On-Demand
We are not a call centre. We are not a national contractor parachuting engineers into postcodes we don't know.
We are a local team. From Worthing and Brighton to Horsham, Guildford, and Woking, we know these homes, these streets, and the heating challenges that come with properties in this part of the country.
When you call us, you speak to someone who actually knows the area.
Here is what working with us looks like:
- 36+ years of heating experience across Sussex and Surrey.
- 1,000+ installations completed — locally, not nationally.
- 30+ five-star Google reviews from real homeowners.
- Both air source and ground source heat pumps installed.
- Grant application handled for you, start to finish.
- Straight, honest advice — we recommend what suits your home, not what earns the highest margin.
Fitted and forgotten isn't how we work.
Our Process
How the Installation Process Works
Step 1 — Free Consultation and Quote
We discuss your property, your heating requirements, and your eligibility for the Boiler Upgrade Scheme grant. No obligation. No pressure.
Step 2 — Full Property Survey and Heat Loss Calculation
Our engineers visit your home and assess everything — insulation, existing heating setup, hot water demand, and the best position for the outdoor unit. Nothing is guessed.
Step 3 — Grant Application Handled For You
Where eligible, we file the Boiler Upgrade Scheme paperwork on your behalf. The saving is applied directly to your installation cost.
Step 4 — Professional Installation
Most installations are completed within one to three days. Our engineers work carefully, cleanly, and with full respect for your home throughout.
Step 5 — Handover and Aftercare
Before we leave, we walk you through how to operate and get the best from your new system. Questions afterwards? We are still here.
Balanced Advice
The Honest Case For and Against
We would rather give you the full picture than oversell.
The case for
Lower energy bills, significantly reduced carbon emissions, a system that lasts 20 years or more, and up to £7,500 in grant funding available right now. For most Sussex and Surrey homeowners, the numbers stack up well.
The one consideration
Upfront installation costs are higher than a gas boiler. That is true. But once the grant is applied and you factor in long-term energy savings, most homeowners find the decision straightforward.
Still unsure? Book a free survey. Our engineers will give you a genuine, honest assessment of whether a heat pump is the right fit for your property — with no pressure either way.
Book a Free SurveyGet Started
Get Your Free Quote
Ready to explore heat pump installation in Sussex or Surrey — or just want honest advice before deciding?
Call us on 01903 802395, email info@on-demand-group.co.uk, or use the form below. We will check your grant eligibility, assess your property, and give you a clear picture of costs and savings — with no obligation to proceed.
Same and next-day consultations available.
Customer Reviews
What Our Customers Say
Paul Coventry has completed a successful job replacing my old back boiler with a new one in the loft. Also replaced my cold water tank and smartened up pipe work. Really good attitude and attendance etc. Knows his stuff.
Dave Saunders
3 months ago
Prompt, communicative, cost effective and professional.
Adam Knight
3 months ago
Just had Paul from cpl come to instal a new under sink hot water system, sink and vanity unit. Very impressed with professional he is.
Carl Roper
4 months ago
Brilliant customer service, lovely friendly chap that explained everything to us that we were unsure of.
Joe Hayes
5 months ago
Top Service — We have had boiler services, radiator instals and movements, bathroom plumbing. Thoroughly recommend.
Stu MacGarvie
9 months ago
Great communication, speedy install (arrived on time, installed and commissioned boiler in a day) and great tidy up. Very happy.
Robin Howard
6 months ago
Learn More About Gas Boilers:
● FAQs
Frequently Asked Questions
Everything you need to know before booking.
Do air source heat pumps work in cold weather?
Yes. Modern air source heat pumps operate effectively in temperatures as low as minus 15 degrees Celsius, making them suitable for UK winters in Sussex and Surrey.
How much does air source heat pump installation cost in Sussex and Surrey?
Installation typically costs between £2,500 and £13,000 depending on system type and property size. After applying the £7,500 Boiler Upgrade Scheme grant, the net cost is significantly reduced for eligible homeowners.
Can I get a government grant for an air source heat pump?
Yes. The Boiler Upgrade Scheme offers eligible homeowners in England and Wales up to £7,500 toward installation costs. Boilers On-Demand handles the grant application on your behalf.
How long does air source heat pump installation take?
Most installations are completed within one to three days depending on the system type and property.
What brands do you install?
We install leading brands including Vaillant and Grant, both proven performers in the UK climate and well suited to Sussex and Surrey homes.
What is the difference between air source and ground source heat pumps?
Air source heat pumps extract heat from the outside air and are quicker to install. Ground source heat pumps use buried pipes to extract heat from the ground and are better suited to larger properties with outdoor space. We install both.
Will I need to replace my radiators?
Not always. Our heat loss survey will identify whether your existing radiators are compatible. Some properties benefit from larger radiators or underfloor heating but many homes can use their existing setup.
● AREAS WE COVER
Areas We Cover Across Sussex and Surrey
Our engineers are based locally and cover the full breadth of East and West Sussex, as well as Surrey.
Worthing | Brighton | Horsham | Crawley | Guildford | Woking | Chichester | Eastbourne | Hastings | Lewes | Haywards Heath | East Grinstead | Littlehampton | Bognor Regis | Arundel
Not on the list? Call us, we will most likely cover you.
30+
GOOGLE REVIEWS
1,000+
NEW BOILERS INSTALLED
36+
YEARS EXPERIENCE